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GB2284940B - Microwave filter - Google Patents

Microwave filter

Info

Publication number
GB2284940B
GB2284940B GB9325661A GB9325661A GB2284940B GB 2284940 B GB2284940 B GB 2284940B GB 9325661 A GB9325661 A GB 9325661A GB 9325661 A GB9325661 A GB 9325661A GB 2284940 B GB2284940 B GB 2284940B
Authority
GB
United Kingdom
Prior art keywords
filter
pct
port
response
date jun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9325661A
Other versions
GB9325661D0 (en
GB2284940A (en
Inventor
John David Rhodes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Filtronic PLC
Original Assignee
Filtronic PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filtronic PLC filed Critical Filtronic PLC
Priority to GB9325661A priority Critical patent/GB2284940B/en
Publication of GB9325661D0 publication Critical patent/GB9325661D0/en
Priority to EP95903425A priority patent/EP0734594B1/en
Priority to DE69423239T priority patent/DE69423239T2/en
Priority to AT95903425T priority patent/ATE190171T1/en
Priority to CA002178727A priority patent/CA2178727C/en
Priority to PCT/GB1994/002747 priority patent/WO1995017023A1/en
Priority to US08/663,145 priority patent/US5781084A/en
Publication of GB2284940A publication Critical patent/GB2284940A/en
Priority to FI962433A priority patent/FI121036B/en
Priority to NO19962501A priority patent/NO317320B1/en
Application granted granted Critical
Publication of GB2284940B publication Critical patent/GB2284940B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/52—One-way transmission networks, i.e. unilines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PCT No. PCT/GB94/02747 Sec. 371 Date Jun. 10, 1996 Sec. 102(e) Date Jun. 10, 1996 PCT Filed Dec. 15, 1994 PCT Pub. No. WO95/17023 PCT Pub. Date Jun. 22, 1995A variable Q reflection mode filter has a three-port circulator, one port of which is terminated by a one-port filter. The filter includes a ladder network of resonators, successive of the resonators having progressively reducing Q values. The filter increases the overall 3 dB resonance point of the filter to reduce the unloaded Q factors required for particular applications. The filter may be arranged to provide a maximally flat response, an equiripple response, or a quasi-ripple response. Transmission zeros may also be incorporated to further enhance the effective unloaded Q.
GB9325661A 1993-12-15 1993-12-15 Microwave filter Expired - Fee Related GB2284940B (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB9325661A GB2284940B (en) 1993-12-15 1993-12-15 Microwave filter
US08/663,145 US5781084A (en) 1993-12-15 1994-12-15 Microwave reflection filter including a ladder network of resonators having progressively smaller Q values
DE69423239T DE69423239T2 (en) 1993-12-15 1994-12-15 MICROWAVE FILTER
AT95903425T ATE190171T1 (en) 1993-12-15 1994-12-15 MICROWAVE FILTER
CA002178727A CA2178727C (en) 1993-12-15 1994-12-15 Microwave filter
PCT/GB1994/002747 WO1995017023A1 (en) 1993-12-15 1994-12-15 Microwave filter
EP95903425A EP0734594B1 (en) 1993-12-15 1994-12-15 Microwave filter
FI962433A FI121036B (en) 1993-12-15 1996-06-12 Microwave Filter
NO19962501A NO317320B1 (en) 1993-12-15 1996-06-13 Mikrobolgefilter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9325661A GB2284940B (en) 1993-12-15 1993-12-15 Microwave filter

Publications (3)

Publication Number Publication Date
GB9325661D0 GB9325661D0 (en) 1994-02-16
GB2284940A GB2284940A (en) 1995-06-21
GB2284940B true GB2284940B (en) 1997-11-19

Family

ID=10746653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9325661A Expired - Fee Related GB2284940B (en) 1993-12-15 1993-12-15 Microwave filter

Country Status (9)

Country Link
US (1) US5781084A (en)
EP (1) EP0734594B1 (en)
AT (1) ATE190171T1 (en)
CA (1) CA2178727C (en)
DE (1) DE69423239T2 (en)
FI (1) FI121036B (en)
GB (1) GB2284940B (en)
NO (1) NO317320B1 (en)
WO (1) WO1995017023A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6448872B2 (en) 1996-03-23 2002-09-10 Filtronic Plc Reflection-mode filter and method with a constant loss off-set
US5977835A (en) * 1998-02-06 1999-11-02 Adc Telecommunications, Inc. Method and circuit arrangement for reducing passband ripple of a bandpass filter
US7323955B2 (en) * 2005-06-06 2008-01-29 The United States Of America As Represented By The Secretary Of The Navy Narrow-band absorptive bandstop filter with multiple signal paths
US8013690B2 (en) * 2008-05-22 2011-09-06 TeraSys Technologies LLC Electronically tunable, absorptive, low-loss notch filter
US8305164B1 (en) 2009-06-09 2012-11-06 The United States Of America, As Represented By The Secretary Of The Navy Frequency-agile frequency-selective variable attenuator
GB201000228D0 (en) * 2010-01-06 2010-02-24 Isotek Electronics Ltd An electrical filter
WO2015123668A1 (en) 2014-02-14 2015-08-20 University Of Southern California Hybrid-based cancellation in presence of antenna mismatch
US10581650B2 (en) 2015-09-08 2020-03-03 Qorvo Us, Inc. Enhancing isolation in radio frequency multiplexers
US9866201B2 (en) 2015-09-08 2018-01-09 Abtum Inc. All-acoustic duplexers using directional couplers
US9762416B2 (en) 2015-09-08 2017-09-12 Abtum Inc. Reflection coefficient reader
US9912326B2 (en) 2015-09-08 2018-03-06 Abtum Inc. Method for tuning feed-forward canceller
US9755668B2 (en) 2015-09-30 2017-09-05 Abtum Inc. Radio frequency complex reflection coefficient reader
US10038458B2 (en) 2015-10-06 2018-07-31 Abtum Inc. Reflection-based radio-frequency multiplexers
WO2017065997A1 (en) 2015-10-12 2017-04-20 Abtum Inc. Hybrid-coupler-based radio frequency multiplexers
KR102419926B1 (en) 2016-09-21 2022-07-11 코르보 유에스, 인크. Improved Isolation of Hybrid-Based Radio Frequency Duplexers and Multiplexers
US11621700B2 (en) * 2020-10-01 2023-04-04 Regents Of The University Of Colorado, A Body Corporate Non-reciprocal RF-bandpass filters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122742A (en) * 1965-11-19 1968-08-07 Pye Ltd Improvements in or relating to apparatus for combining signals
US4296389A (en) * 1979-05-14 1981-10-20 Sanders Associates, Inc. Crimped coax reflective dispersive delay line
US4538123A (en) * 1984-01-20 1985-08-27 The United States Of America As Represented By The Secretary Of The Army Dielectric waveguide bandpass apparatus
EP0262391A2 (en) * 1986-09-29 1988-04-06 ANT Nachrichtentechnik GmbH Arrangement for connecting several transmitters and receivers
GB2232304A (en) * 1988-05-27 1990-12-05 Motorola Inc A passive stabilizer for a signal generating source

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760303A (en) * 1972-08-25 1973-09-18 Bell Telephone Labor Inc Conductance-loaded transmission line resonator
US4418324A (en) * 1981-12-31 1983-11-29 Motorola, Inc. Implementation of a tunable transmission zero on transmission line filters
SU1561131A1 (en) * 1988-01-11 1990-04-30 Предприятие П/Я А-3565 Super high frequency shaper of frequency marks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122742A (en) * 1965-11-19 1968-08-07 Pye Ltd Improvements in or relating to apparatus for combining signals
US4296389A (en) * 1979-05-14 1981-10-20 Sanders Associates, Inc. Crimped coax reflective dispersive delay line
US4538123A (en) * 1984-01-20 1985-08-27 The United States Of America As Represented By The Secretary Of The Army Dielectric waveguide bandpass apparatus
EP0262391A2 (en) * 1986-09-29 1988-04-06 ANT Nachrichtentechnik GmbH Arrangement for connecting several transmitters and receivers
GB2232304A (en) * 1988-05-27 1990-12-05 Motorola Inc A passive stabilizer for a signal generating source

Also Published As

Publication number Publication date
ATE190171T1 (en) 2000-03-15
NO962501D0 (en) 1996-06-13
CA2178727A1 (en) 1995-06-22
EP0734594A1 (en) 1996-10-02
NO317320B1 (en) 2004-10-11
US5781084A (en) 1998-07-14
CA2178727C (en) 2003-04-08
NO962501L (en) 1996-08-01
FI962433L (en) 1996-08-12
DE69423239D1 (en) 2000-04-06
FI962433A0 (en) 1996-06-12
EP0734594B1 (en) 2000-03-01
GB9325661D0 (en) 1994-02-16
DE69423239T2 (en) 2001-05-23
FI121036B (en) 2010-06-15
WO1995017023A1 (en) 1995-06-22
GB2284940A (en) 1995-06-21

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20121215